What does the standard NATO marker that spells out "ATOM" warn you against?

The standard NATO marker that spells out "ATOM" is specifically used to warn individuals about the presence of residual radiation, typically associated with nuclear activities or an atomic event. This marker is deployed in scenarios where there may be hazardous radioactive materials or contamination in the area, which pose a threat to health and safety. The use of such a standardized marker ensures that personnel can quickly recognize the danger and take appropriate precautions.

Other hazards such as chemical spills, biological hazards, and conventional explosives have their own distinct markers and protocols, meaning they are not indicated by the "ATOM" marker. Understanding this distinction is vital for proper safety and operational response in potentially hazardous environments.